The victim suffered numerous stab wounds to his abdomen, arms, legs, neck and the back of his head, according to Cook County prosecutors and police.

The victim reportedly offended Scott when he asked him whether he sent a gang of people to "jump him" on a previous occasion, the Chicago Tribune reported.

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The bloody assault was captured on cell phone video by eyewitnesses on the bus.

As the two men began to brawl on the floor, Scott took out a pocket knife and began stabbing, as he admitted to police during questioning.

The victim was transported to an area hospital in critical condition, while Scott was also hospitalized with injuries.

Scott was later jailed on the charge of aggravated battery and bodily harm.

Although Cook County Judge John F. Lyke Jr. noted that it was the victim who seemed to have started the fight, he denied bail after prosecutors argued that Scott threw the first punch.

Lyke also ordered Scott to have no contact with the victim.

He is scheduled to return to court next week.

About 90 perfect of the crimes committed on trains and buses provided by the Chicago Transit Authority (CTA) go unsolved, reports the Chicago Sun-Times.

Most serious transit-related crimes in Chicago occur on the L train, according to an analysis of CTA and police data by the Sun-Times.

That includes 1,906 "index crimes" since 2015 -- which includes homicides, robberies, burglaries and rapes.

But the L train is not the only culprit. On the Green Line train in 2014, a husband punched his wife "10-12 times with a closed fist on her face/head while she was sitting down" after she told him "she would not have sex with him."

And on a CTA bus in Skokie, a man was caught trying to "pleasure himself" while staring at another passenger.